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|
mod reflow;
mod scrollbar;
mod scrolllist;
mod stateful_paragraph;
pub mod style;
mod syntax_text;
use filetreelist::MoveSelection;
use ratatui::layout::{Constraint, Direction, Layout, Rect};
pub use scrollbar::{draw_scrollbar, Orientation};
pub use scrolllist::{draw_list, draw_list_block};
pub use stateful_paragraph::{
ParagraphState, ScrollPos, StatefulParagraph,
};
pub use syntax_text::{AsyncSyntaxJob, SyntaxText};
use crate::keys::{key_match, SharedKeyConfig};
/// return the scroll position (line) necessary to have the `selection` in view if it is not already
pub const fn calc_scroll_top(
current_top: usize,
height_in_lines: usize,
selection: usize,
) -> usize {
if current_top.saturating_add(height_in_lines) <= selection {
selection.saturating_sub(height_in_lines) + 1
} else if current_top > selection {
selection
} else {
current_top
}
}
/// ui component size representation
#[derive(Copy, Clone)]
pub struct Size {
pub width: u16,
pub height: u16,
}
impl Size {
pub const fn new(width: u16, height: u16) -> Self {
Self { width, height }
}
}
impl From<Rect> for Size {
fn from(r: Rect) -> Self {
Self {
width: r.width,
height: r.height,
}
}
}
/// use layouts to create a rects that
/// centers inside `r` and sizes `percent_x`/`percent_x` of `r`
pub fn centered_rect(
percent_x: u16,
percent_y: u16,
r: Rect,
) -> Rect {
let popup_layout = Layout::default()
.direction(Direction::Vertical)
.constraints(
[
Constraint::Percentage((100 - percent_y) / 2),
Constraint::Percentage(percent_y),
Constraint::Percentage((100 - percent_y) / 2),
]
.as_ref(),
)
.split(r);
Layout::default()
.direction(Direction::Horizontal)
.constraints(
[
Constraint::Percentage((100 - percent_x) / 2),
Constraint::Percentage(percent_x),
Constraint::Percentage((100 - percent_x) / 2),
]
.as_ref(),
)
.split(popup_layout[1])[1]
}
/// makes sure Rect `r` at least stays as big as min and not bigger than max
pub fn rect_inside(min: Size, max: Size, r: Rect) -> Rect {
let new_width = if min.width > max.width {
max.width
} else {
r.width.clamp(min.width, max.width)
};
let new_height = if min.height > max.height {
max.height
} else {
r.height.clamp(min.height, max.height)
};
let diff_width = new_width.saturating_sub(r.width);
let diff_height = new_height.saturating_sub(r.height);
Rect::new(
r.x.saturating_sub(diff_width / 2),
r.y.saturating_sub(diff_height / 2),
new_width,
new_height,
)
}
pub fn centered_rect_absolute(
width: u16,
height: u16,
r: Rect,
) -> Rect {
Rect::new(
(r.width.saturating_sub(width)) / 2,
(r.height.saturating_sub(height)) / 2,
width.min(r.width),
height.min(r.height),
)
}
///
pub fn common_nav(
key: &crossterm::event::KeyEvent,
key_config: &SharedKeyConfig,
) -> Option<MoveSelection> {
if key_match(key, key_config.keys.move_down) {
Some(MoveSelection::Down)
} else if key_match(key, key_config.keys.move_up) {
Some(MoveSelection::Up)
} else if key_match(key, key_config.keys.page_up) {
Some(MoveSelection::PageUp)
} else if key_match(key, key_config.keys.page_down) {
Some(MoveSelection::PageDown)
} else if key_match(key, key_config.keys.move_right) {
Some(MoveSelection::Right)
} else if key_match(key, key_config.keys.move_left) {
Some(MoveSelection::Left)
} else if key_match(key, key_config.keys.home)
|| key_match(key, key_config.keys.shift_up)
{
Some(MoveSelection::Top)
} else if key_match(key, key_config.keys.end)
|| key_match(key, key_config.keys.shift_down)
{
Some(MoveSelection::End)
} else {
None
}
}
#[cfg(test)]
mod test {
use super::{rect_inside, Size};
use pretty_assertions::assert_eq;
use ratatui::layout::Rect;
#[test]
fn test_small_rect_in_rect() {
let rect = rect_inside(
Size {
width: 2,
height: 2,
},
Size {
width: 1,
height: 1,
},
Rect {
x: 0,
y: 0,
width: 10,
height: 10,
},
);
assert_eq!(
rect,
Rect {
x: 0,
y: 0,
width: 1,
height: 1
}
);
}
#[test]
fn test_small_rect_in_rect2() {
let rect = rect_inside(
Size {
width: 1,
height: 3,
},
Size {
width: 1,
height: 2,
},
Rect {
x: 0,
y: 0,
width: 10,
height: 10,
},
);
assert_eq!(
rect,
Rect {
x: 0,
y: 0,
width: 1,
height: 2
}
);
}
}
|
